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J. M. JOYCE. VISE FOR DRILLING MACHINES.

APPLICATION FILED MAY 13. I'9l9.

Patented Sept. 9,1919.

FIG.

OFFC JAMES M. .IoYoE, OFAIVIARILLO, Tunas, assioiroaorlonn-rn an To James D. nsures. ANDONE-TI-IIRD .TO JosErI-r c. Dixon, :Bo'rnor aiviAaIL o, Texas,

VISE r012, nninmuomncnmns.

Specification of Letters Ifatent.

Patented Sept. 9, 1919.

Application filed May 13, 1919. Serial No. 296,890.

half nut 19, and the shaft 21 has a handle To all whom it may concern:

Be it known that I, JAMES M. Joyce, a citizen of the United States, residin at Amarillo, in the county of Potter and tate of Texas, have invented certain new Improvements in Vises for Drilling-Machines, of which the following is a specification.

This invention relates to Vises for holding work under the tool spindles of drilling machines; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed whereby the work is positioned and clamped under the drill.

In the drawings, Figure 1 is a side view of a vise constructed according to this invention, showing also portions of a drilling machine. Fig. 2 is a plan view of the same. Fig. 3 is a longitudinal section through the vise, taken on the line 33 in Fig. 2. Fig. 4 is a cross-section taken on the line 4.-4: in Fig. 3. Fig. 5 is a detail View of one of the vise jaws.

The supporting upright 5 of a drilling machine is provided with a forked arm 6 for supporting the customary work table or work, and these parts are of any approved construction, the work table being removed to make room for the vise.

Two guide bars 7 7 are provided and are arranged parallel to each other and so that they straddle the table arm 6. Arms 8 Sam secured at one end to the guide bars, and are provided with bearings 9 at their other end portions which are clamped to the standard or upright 5 by bolts 10. The arms 8' are angle-shaped, and their bearings 9 can be sprung toward each other a little to clamp them to the upright. Two similar housings 12 are secured crosswise between the end portions of the guide bars 7 and are coupled together by guide rods 14 arranged at their sides and over and parallel to the guide bars ,7.

Two similar arch-shaped jaws 15 are provided, and their side portions are provided with holes 16 which slide over the guide rods 14, and with notches 17 which slide on the guide bars 7.

Each housing 12 has a half nut 18 at its middle part, vand a slidable half nut 19 is arranged. in the housing below the half nut 18. A cam 20 is secured on a shaft 21 which is journaled in the housing so that the cam works under the middle part of the slid-able 22 on one endtportion for oscillating it.

I Springs 24 are arranged in the housing for pressing the slidable half nut 19 downwardly, but may be dispensed with as the half nuts will descend by gravity.

Two similar screws 28 are provided, and have means for revolving them at one end, such as a bar handle 29 or a hand plate or knob 30. Each screw has a pivot 31 at one end portion which is jo-urnaled in a bearing 32 in the visa jaw to which it pertains, and which is prevented from sliding longitudinally by shoulders 33. The pivot engages loosely with the vise j avv, and the screw engages with the two half nuts 18 and 19, when the slidable half nut 19 is raised, so that the jaws may be slid back and forth on the cred, and each vise jaw is adjusted rapidly by holding its screw out of engagement with the half nuts pertaining to it and sliding it longitudinally together with the vise jaw.

Each vise jaw is adjusted independently of the other, and when the desired point of the work is brought under the drill, the center line of which is indicated by the dotted line 35, the lower half nuts are raised, and the work is clamped between the vise jaws by means of the screws. The work may be supported on the forked table arm 6, if desired, before being clamped between the two vise jaws.

What I claim is:

1. The combination, with the upright of a drilling machine, and an arm for supporting work projecting therefrom; of two parallel guides .arranged one oneach side of the said arm and provided with means for support ing them from the upright independently of j the said arm, 'two vise jaws slidable on the said guides, and means for sliding the vise jaws independently of each other to grip an able on the said guides, and means for sliding the vise jaws independently of each other to grip an object resting on the said arm. r

In a vise, a pair of parallel guides hav- 7 ing housings at their end portions provided 10 with half nuts,tw.o vise jaws slidable on the said guides, half nuts slidable in the housings, revoluble screws pivoted to the vise jaws and working in the said half nuts, and

cams mounted in the housings and adapted .to operate the slida-ble half nuts and place the said screws into and out of engagement with the half nuts on the housings.

In testimony whereof I have afiixed my signature.

JAMES M. JOYCE.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0. 

